Carbureter



E. T. ROBY.

CARBURETER. APPLICATION FILED DEC- l3, 1918.

2 SHEETS-SHEET I.

' P. mu. I

Patented Oct. 1 1921..

E. T. ROBY.

' CARBURETER.

APPLICATION FILED DEC. I3, 1918.

1 394 35 Patented Oct 18,1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE. I

EDMUND '1. ROBY, OF DECATUR, ILLINOIS, ASSIGNOB, OF ONE-HALF TO THOMAS C.

. BUXTON', 0F DECATUR, ILLINOIS.

CARBURETERi Application filed December 13, 1918.

T 0 all to from it may concern:

Be it known that I, EDMUND T. Roar, a citizen of the United States, residin at Decatur, in the county of Macon and btate of Illinois, have invented new and useful Improvements in Carburetors, of which the following is a specification.

One of the principal objects of my invention is to provide a novel construction of carburetor, having novel means for controlling the passage of hydrocarbon and air to the mixing-chamber.

- Another object is to provide a carbureter of simplified construction, and one which is compact in organization.

With these objects in view, the invention resides in the novel construction, combination and arrangement of parts of a carbureter, as hereinafter fully described in the specification, pointed out in the claims, and illustrated in the drawings.

In the accompanying drawings, I have disclosed an illustratory concrete embodiment of the underlying principles of the invention. The different figures or views of the drawings may be briefly described as follows:

Figure l'is a view in top plan bureter; I

Fig. 2is a view in side elevation thereof;

Fig. 3 is a sectional view, on theline 8-3, Fig. 1, looking in the direction of-the arrows;

Fig. 4 is a'detached detail view of the stationary tubular member and of the rotatable valvesleeve encircling thesame, the sleeve being partly broken away; I

Fig. 5 is a sectional view, on the line 55, Fig. at. I

Referring, now, in detail to the drawings:

1 designates'the usual float-chamber adapted to receive and maintain a constant quan tity of hydrocarbon, which may be fed thereto from an elevated tank, oryby' a suitable pumping device, through a feed-pipe, connected to a threaded, hollow coupling 2. The float-rod 3 is operatively connected, at its top, with one end of a lever 4, the other end of the latter being articulated with the upper end of the needle-valve 5 controlling the flow of" gasolene to thefioat-chamber'l. The parts so far describedare well known, and; form no part of my invention.

I Connected with: the float-chamber casing 18 casing6,.hene shownas tnbnlar, although of my car- Specification of Letters Patent.

Patented Oct. 18, 1921.

Serial No. 266,610.

it is obvious the casing might take forms other than tubular so far as its exterior contour is concerned, the only requirement being that its interior be of tubular contour. Interiorly of this casing 6 is an internal bore of differing diameters, and, for this purpose, the casing may be provided, appropriately, with a lateral, concentric, constricted extension, or neck, 7, having an open end 8. The opposite end of the'casing is conveniently closed, as by a screw-cap 8. The extension 7 may be provided with one or more openings 9. v

V Disposed within the casing 6 is a tubular member 10, the end thereof adjacent the cap 8 being closed, as shown at-11, andthe other end thereof being open. As clearly shown in F 1g. 3, the tubular member 10 projects into the extension or neck 7 and closely fits the same, so that the entire circumferential area of the portion ofthe member 10 within the neck 7 bears against the. inner surface of the latter. The tubular-member 10 is provided with an exterior circumferential flange 12, adaptedto bear, preferably through an interposed packing or gasket 14, against an annular shoulder 13 of the casing 6, at the inner end of the'n'eck 7. Themember 10 is appropriately provided with an opening 15 coincident with the opening 9 of the neck 7.

Any suitable means may be provided for maintaining the tubular memberlO against rotation in the casing 6,in this instance, as an example, the verysimpleexpedient of a set-screw'l6 is shown, which screw is screwed into the neck 7 and themember'lO, as shown in Fig. 3.

It will be noticed that, by the'construction described, when the tubular member 10 is in position, as shown in Fig. 3, a chamber 17 is provided between thecasingo, atthe enlarged diameter thereof, and the portion of the tubular member 10' withinsuch enlarged diameter, and thischamber constitutes the mixing chamber, as will presently appear.

The tubular member 10 is provided with a preferably rectangular opening 18 communicating with said mixing-chamber 17,

said opening constituting thezair inlet to the valve 20. Communicating with the top end of said port 19 isa pipe 21, which preferably extends across the open end of the casing 6 and thence longitudinally of and within the tubular member 10, as clearly shown in Fig. 3, and terminates in a series of atomizingholes 22 registering with similar holes in the member 10 adjacent one edge of the airopening 18.

Suitable means are provided for controlling the passage of air to the mixing chamber 17 through the air-opening 18, and of the atomized. fuel through the atomizing apertures 22, and, as disclosed in the drawings, I prefer to use a valve-sleeve 23 or rotary valve encircling the portion of the tubular member 10 within the larger diameter of the casing 6, said sleeve being provided with a closedend 2-1 and with an axial stem 25 mounted in bearings 26 in the screw-cap 8 The exteriorly projecting end of the stem 25 is articulated with a crank 27 operatively connected, through intermediate mechanism (not shown) with some control member (such, for instance, as the steering-wheel lever) within convenient reach of the operator of the automobile equippedwith my carbureter; or such valve may be automatically controlled by a governor in accordance with the speed of the engine.

The valve-sleeve 23 is provided with an opening 28, which, in contradistinction to the air-opening 18 in the tubular member 10, isnot rectangular, but has an oblique or slanted side or edge 28 ,-z' 6., a side or edge which is formed at an angle to the longitudinal plane in which the other side or edge 28 is formed. The opening 28 is arranged relative to the opening 18 so that, when the valve-sleeve 23 is partially rotated from the position thereof shown in Fig. 4:, the oblique side 28 of the opening will gradually sweep over the air-opening 18 and will then sweep over the atomizing apertures 22 successively. A stop 29, in this instance a screw, carried by the tubular member 10, is adapted to engage a recess 80 in the sleeve-valve 23, to limit movement of the valve-sleeve in one direction of rotation, and the same stop contacting with the oblique edge 28 of the opening 28 limits movement of the valve-sleeve in the opposite direction of rotation; but, manifestly, any other desired arrangement may be provided for limiting rotary movement of the sleevevalve.

Carried exteriorly of the sleeve-valve 23 is a screen 31, of fine mesh, which breaks up the gasolene passing to the mixing-chamber 17 and causes an intimate admixture of the air with the gasolene; i. 0., the screen 1 acts as a strainer to finely divide the air and operable air-valve, 32 may be provided, said valve communicating with the mixingchamber 17.- i

The operation is thought to be apparent from the foregoing detailed description of the construction and structural combination but, briefly stated, it is as follows: Gasolene passes from the float-chamber 1 and, through the port19, thence through the pipe 21 and by suction, through the atomizing-holes 22, and into the mixing-chamber 17, with the valve 23 in the positlon shown in Fig. 4, in which position the valve-opening 28 uncovers the atomizing-apertures 22, as shown. Air passes through the tubular member 10, entering at the open end thereof, and through the coincident apertures 9 and 15, and escapes through the air-exit 18 in the tubular member into the mixing-chamber 17, the air and gasolene also passing through the screen 31, and being thoroughly commingled, and the air vaporized. Thence, the fuel mixture'passes through the throttle valve chamber 83 to the engine. Regulable quantities of air and gasolene passing to the mixing-chamber Imay be obtained by rotation of the valve-sleeve23. Y

In compliance with the patent statutes, I have described with great particularity-one form of embodiment of my invention; but it is to be recognized that changes may be made inthe physical embodiment, within the terms of the appended claims, without departing from the spirit of the invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters-Patent is: V

1. In a carbureter, the combination, with a tubular casing open, at one end, for the admission of air, of a tubular member disposed within, and having an open end coincident With'theopen end of, said casing, said casing and member being arranged to provide therebetween a mixing-chamber, said member beingprovided with an air-aperture communicating 'with said i mixingchamber, and with a series of atomizing-perforations adjacent said air-aperture, a gasolene-conveying pipe entering said casing and communicating with said perforations, and a rotary valve revolubly mounted on said member and controlling passage to said mixing-chamber, through said air-opening and atomizingrperforations, of the air and gasolene. V

2. In a carbureter, the combination, with a tubular casing open, atone end, for the admission of air and closed-at the other end, a tubular member disposed within, and having an openend coincident with the open end of, said casing, said casing being provided with an internal shoulder and said tubular member. with a circumferential flange bearing against said shoulder, the portions closed end of said casing and said flange providing therebetween a mixing-chamber, said member being provided with an airaperture communicating with said mixingchamber, and with a series of atomizing-perforations adjacent said air-aperture, a gasolene-conveying pipe entering said casing and communicating with said perforations, and a rotary valve revolubly mounted on said member and controlling passage to said mixing-chamber, through said air-opening and atomizing-perforations, of the air and gasolene.

3. In a carbureter the combination of a casing; a second casing of smaller diameter nested insaid first casing to provide a mixing chamber between said casings, said smaller casing having an air inlet and an air outlet delivering to said mixing chamber; gasolene feeding means delivering adjacent the air outlet of said inner casing; and a sleeve valve revolubly mounted on said inner casing and controlling both the air outlet and gasolene feed to the mixing chamber.

4:. In a carbureter, the combination of a casing; a tubular casing of smaller diam eter nested in said first casing to provide a mixing chamber between said casings, said smaller casing being open at one end and having an air outlet in its side wall delivering to said mixing chamber; gasolene feeding means delivering throughfthe wall of said inner casing adjacent the air outlet; a sleeve valve revolubly mounted on said inner casing and controlling both the air outlet and gasolene feed to the mixing chamber; and means for operating said valve exteriorly of said casing.

5. In a carbureter, the combination of a casing; an open ended tubular casing of smaller diameter, nested in said first named casing and having an air outlet in its wall delivering to the mixing chamber between the two casings gasolene feeding means traversing said open ended inner casing and delivering through the side wall thereof adjacent said air outlet; and a sleeve valve revolubly mounted on said inner casing and controlling both the air outlet and the gasolene feed to the mixing chamber.

6. In a carbureter, the combination of a casing having a removable cap at one end;

an open ended casing of smaller diameter nested in said first casing, and having an air outlet in its side wall delivering to the mixing chamber between the two casings; gasolene feeding means traversing said open ended inner casing and delivering adjacent the air outlet to the mixing chamber; an open ended sleeve valve revolubly seated on said inner casing, and having a port controlling both the air outlet and gasolene feed; and a valve operating spindle mounted in and projecting through the said closing cap for said outlet casing.

In testimony whereof I have hereunto set my hand.

EDMUND T. ROBY. 

